Finding the Fourth Proportional to 22,188.80, 30,621.52 and 12,760.48

Step by Step Solution

1. Step 1: Write the proportion equation
   22,188.80 : 30,621.52 = 12,760.48 : x
2. Step 2: Convert to fraction form
   22,188.80/30,621.52 = 12,760.48/x
3. Step 3: Cross multiply
   22,188.80x = 30,621.52 × 12,760.48
4. Step 4: Simplify right side
   22,188.80x = 390,745,293.53
5. Step 5: Solve for x
   x = 390,745,293.53/22,188.80
6. Step 6: Final answer
   x = 17,610.02